blinn phong shading math?

[dharhar]

I've implemented the math from the tutorial slides but am getting this output. Any ideas on what could be going wrong?

[vpineda1996]

Try using the sphere image. Are you also adding ambient light?

[dharhar]

I added ambient light outside of the loop going over all lights. When I used sphere.json, I just get a black screen, but my color values are all 0.0x